The manual says depending on riding conditions for the 600 mile cleaning, that does seem a little excessive. I have cleaned my chain twice and I got my bike at 2800 miles. Whoever had it before me didnt clean it at all. A thousand miles between chain cleanings seems to be just right for me, I use about a 1/4 of a can of cleaner. The 1st time I cleaned it I used a whole can of cleaner.I think 600 miles is overkill unless you're riding on dirt roads. I've been cleaning mine every 3rd or 4th lubing, and my chain/sproket look good with 50,000 kms on the bike.